TV tuner

I've just bought a MSI VOX USB2.0 External TV Tuner as advertised in PCA, works like a dream and the extras are fantastic. It running on my laptop that is specked up yet the picture is a lot slower than the TV. Watching snooker on it is almost impossible...anyone any ideas?

That's a bit strange, I would have thought it was onboard Graphics. It was memory probs I had when I started out with TV card and had to keep it down to low res 640x480 when I increased the memory it went up to 800x600 to fill the screen